Improvement in saw-gummers



J. CONNOR.

SAW-GUMMER.

No. 172,392. ?atented J'an.18,1876.

NPETERS. PHOTCLUTHOGRAPHLR. WABMING1ON. D. C.

UNITED STATES PATENT Orrxon.

JOHN CON N OR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF HISRIGHT TO HENRY DISSTON, HAMILTON DISSTON, AND ALBERT H.

DISSTON, OF SAME PLACE.

IMPROVEMENT IN SAW-SUMMERS.

Specification forming part of Letters Patent No. 172,392, dated January18, 1876; application filed December 29, 1875.

To all whom it may concern:

Be it known that I, JOHN CONNOR, of Philadelphia, Pennsylvania, haveinvented an Improved Saw-Gummer, of which the following is aspecification:

My invention relates toimprovements, fully described hereafter, in thatclass of gummers which are used for deepening the throats of circularsaw teeth, my improvements being directed to the simplifying andincreasing the efficiency of machines of this class.

Figure l is a side view of my improved sawgummer; Fig. 2, a rear view;Fig. 3, a plan; Fig. 4, a transverse section on the line 1 2 and Fig. 5,a detached perspective view, illustrating a part of my invention.

The frame of the machine consistsof a substantial cast-iron saddle, A,two legs, a a, of which, Fig. 1, are on one side, and the plate b,Fig.2, on the opposite side of the saw-blade, to which the said saddleis confined by setscrews 61, Fig. 4:. The position of the machine on theblade is determined by an adjustable stop, 6, arranged at one end of thesaddle, and bearing on one tooth of the saw-blade, and against anothertooth by a like adjustable stop, 6 arranged at the opposite end of thesaddle, and also bearing on a tooth of the saw, and by an adjustablebar, 0 which bears against the throat of one of the teeth. To a circularhub or projection, f, Fig. 4, on one side of the saddle, is hung acarrier, D, which is confined to its place by a plate, h, and setscrew0?, the position of this carrier being under the control of ascrewsha-ft, Gr, adapted to a nut, H, which is arranged to swivelbetween jaws formed on the outer end of the carrier, the screw-shaftbeing adapted to a swivel-bearing, n, Fig. 3, on the saddle, and beingfurnishedv at its outer end with a star feed-wheel, E. A shaft, F, hasits bearing in the carrier D, and this shaft is provided with twohandles, 12 and 1), one at each end, and one of these handles has aprojecting rib, g, which at every revolution of the shaft F strikes oneof the teeth of the star-wheel, and thus turns the screw-shaft G. Thecutterspindle I has one of its hearings in the carrier D, and the otherin a bracket, t, forming part of the plate h, which is secured to andturns with the carrier, the said shaft I carrying a cog-wheel, s, whichgears into a pinion, s on the shaft F. The wheel 8 is loose on itsshaft, and carries a spring-pawl, w, adapted to a ratchet-Wheel, '1,secured to the spindle I, so that the rotation of the cutter-spim'llecan be in one direction only, thereby preventing that damaging of thecutterteeth which frequently occurs when theyare accidentallyturnedback.

The saddle having been properly adjusted, so that the cutter H, which isof the usual construction, shall be in the throat of one of the teeth ofthe saw-blade, the operator seizes the handles, one in each hand, andturns the shaft F in the direction of the arrow, Fig. 4; at the sametime the screw G is intermittently rotated by one of the handles and thecarrier D caused to turn on thehubfin the direction of the arrow, Fig.2, and the cutter is conse quently fed forward, so as to remove themetal from the throat ofthe tooth. This is continued until the carrieris arrested by the pointofasetscrew, 0, which has been previouslyadjusted, and which determines the depth of the cut. The carrier is nowmoved back by operating the screwshaft G, the fastenings of the saddlethen loosened, preparatory to attaching it to the blade in a properposition for the cutter to operate on the throat of another tooth, thisposition being determined by the above-mentioned stops.

I claim as my invention 1. The combination, in a saw-gummer, of thecarrier D, hung to the saddle, and carryin g the cutter-shaft Ianddriving-shaft F, with the feed-screw G.

2. The combination of the carrier D, feedscrew G, and star-wheel E,arranged in respect to one of the handles as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN CONNOR. Witnesses:

HARRY HoWsoN, J r., HARRY SMITH.

